D- E and F are respectively the mid-points of sides AB- BC and CA of -ABC- Find the ratio of the area of -DEF and -ABC-

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D, E and F are respectively the mid-points of sides AB, BC and CA of ΔABC. Find the ratio of the area of ΔDEF and ΔABC.

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(i i i) a r e a (B D E F) = \frac{1}{2} a r e a (A B C)

(i i i) a r e a (B D E F) = \frac{1}{2} a r e a (A B C)

D, E and F are respectively the mid-points of the sides BC, CA and AB of triangle ABC. Show that BDEF is a parallelogram.

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